*{
    margin: 0;
    padding: 0;
}
body{
    height: 100vh;
    display: flex;
    justify-content: center;
}
.todo{
    width: 500px;
    height: 500px;
    margin-top: 30px;
}
.title{
    font-size: 50px;
    text-align: center;
    color: red;
}
.input-group{
    display: flex;
    font-size: 30px;
}
.label{
    padding: 10px;
}
.content{
    flex: 1;
    font-size: 20px;
}
.btn{
    width: 80px;
    font-size: 30px;
    margin-left: 10px;
}
.list-item{
    display: flex;
    padding: 20px;
    border-bottom: 1px solid #aaa;
    font-size: 26px;
    align-items: center;
}
.item-check{
    width: 30px;
    height: 30px;
}
.item-content{
    flex: 1;
}
.close{
    display: none;
}
.list-item:hover .close{
    display: block;
}